Why did my epoxy countertops turn yellow?

If you have an epoxy countertop, there’s a good chance it has started to turn yellow. Here’s why your epoxy countertops might be turning yellow and how to fix the problem.

There is nothing more frustrating than having stains on your epoxy countertops that you just can’t seem to get rid of. And while some of these stains are caused by everyday items such as coffee or ink, others can be caused by the chemicals in your epoxy itself.

How do you fix yellowing epoxy countertops?

How do you fix yellowing epoxy countertops?

  • Clean the countertop with a mixture of water and bleach: Mix equal parts water and bleach. Use a sponge to apply the mixture, then rinse it off with clean water. Dry the countertop with a clean towel.
  • Apply a sealer: Apply sealer according to instructions on the packaging, using a sponge as opposed to applying it directly from an aerosol can or spray bottle (which could cause overspray). Let dry overnight before using your new epoxy countertops!

Is epoxy still good if it turns yellow?

Epoxy resin is a hard plastic material. It is not affected by UV light, water, heat, or cold. In fact, epoxy resin is so resistant to change that it can be used as a castable material for things like teeth bridges, and crowns.

The only thing that can affect the color of your epoxy countertop if you live in an area with high humidity or near saltwater areas is if there were some impurities present when the counter was being poured into your mold.

How do you keep epoxy resin from turning yellow?

How do you keep epoxy resin from turning yellow?

You can avoid yellowing by keeping the epoxy clean and dry. If you leave food or drinks on it, your countertop will turn yellow with time. The same goes for leaving it in direct sunlight, which can cause the resin to break down over time if exposed to too much heat (such as when your house is being remodeled).

You should also avoid using abrasive cleaners or bleaches on your epoxy flooring since these products can remove some of the colors from the finish—and if you’re already fighting against yellowing from earlier use of those types of products, this isn’t going to help matters!

Can you reverse yellowing of resin?

If you’ve got a yellowing resin countertop, there are a few things you can do to reverse its color.

  • Use bleach solution: Make a solution of 1 part bleach and 2 parts water and apply it with a soft cloth. Let the mixture sit for an hour, then rinse with water.
  • Use baking soda solution: Make a paste with baking soda and water (1 tablespoon per cup of water). Apply with a soft cloth and let sit for an hour before rinsing off the residue.
  • Use vinegar solution: Mix equal parts vinegar and water; apply with soft cloth; let dry overnight before rinsing away any remaining residue.
  • Use hydrogen peroxide solution: Mix equal parts hydrogen peroxide (3%) and distilled water; apply using paper towels or cotton swabs; let dry completely before moving on to the next step — which may vary depending on what other steps have already been taken on your countertops (see “How to Reverse Yellowing”).

Does epoxy countertops yellow?

Does epoxy countertops yellow

Epoxy resin is a polymer. It’s made of long-chain molecules that are tough, rubbery and durable. But like most polymers, epoxy resin doesn’t like to be exposed to UV light or heat for extended periods of time.

This can cause your countertop to yellow over time, especially if you live in an area where the sun shines brightly all year round.

If you’re wondering why your epoxy countertops have turned yellow after being installed for only a few months, then there may be another reason: oxygen exposure.

Polymers cannot tolerate oxygen exposure very well—it causes them to oxidize (yellows them). This happens when bulk thinners are used on top-coat applications as they contain more volatile hydrocarbons that allow greater air exposure on their surfaces than bottom-coats do (which use solvents instead).

Finally, water can also cause epoxy resins such as those used in countertops and furniture coatings to oxidize and turn yellow over time—especially when it comes into contact with high-gloss paint finishes such as automotive paints because they tend not only contain waxes but also pigments which absorb moisture from both humidity in the air (humid climates) or rainwater runoff/splashback during storms.”

What epoxy does not turn yellow?

Epoxy resin is a thermosetting plastic that undergoes a reaction called polycondensation when cured in the presence of catalysts.

Epoxy resins are commonly used for coating, adhesives, and concrete repairs. Epoxy does not yellow when it hardens because the reaction occurs at an atomic level and results in a white plastic product.

How do you whiten yellow resin?

How do you whiten yellow resin

  • White vinegar: The acidity of white vinegar will help dissolve the yellowing epoxy. Mix 1 part white vinegar with 3 parts water, then pour it over your counters. Let the mixture sit for 30 minutes before wiping away with a clean cloth or sponge.
  • Baking soda: When mixed with water and applied to counters, baking soda has a bleaching effect on yellowed resin surfaces. Mix 1/2 cup of baking soda into 2 gallons of warm water, then use a soft cloth to gently scrub away stains until they’re gone. You can also add a few drops of lemon juice to this mixture for extra whitening power!
  • Bleach: For those who want an even more powerful solution than straight bleach or lemon juice (which may leave behind a residue), try using hydrogen peroxide instead! Just apply it directly onto your countertops using an old rag—just be sure not don’t get any on your hands because it can cause irritation!

How do you get stains out of epoxy countertops?

How do you get stains out of epoxy countertops

If your epoxy countertops are stained, don’t fret! There are ways to clean them and bring back their original beauty.

  • Clean the stain with a detergent solution of one part soap or dishwashing liquid to one part water. Use a soft cloth to apply this solution to the stain and let it sit for about five minutes. Rinse and wipe dry with another soft cloth.
  • Try using a pumice stone (available at most hardware stores) on stains that won’t come off with soap and water alone—it may be the difference between an easily cleaned countertop and one that’s not so easy! Apply a lubricant such as mineral oil or olive oil to make it easier for you to use; then rub gently until you see any remaining grime being removed from the surface of your countertop. You may need some elbow grease here, but once again: patience!

If neither method works for you, try using a commercial cleaner designed specifically for epoxy surfaces; these cleaners usually contain no abrasives like baking soda or vinegar which could damage an otherwise pristine surface during cleanup efforts


The best way to prevent yellowing is to use a non-yellowing epoxy resin, and UV stable pigment powders. The next best solution is to protect the epoxy countertops from direct sunlight – either by keeping them covered with a tablecloth or some other kind of cover during the day.

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Martin Flood

Martin Flood has been working in the construction industry for over 20 years as a general contractor with expertise in remodeling projects that are large or small. He has furthered his career by specializing in epoxy resin flooring, providing excellent service to both commercial and residential clients. Martin’s experience enables him to offer professional advice on how to choose the right type of project based on your needs and budget.

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